Looks very cool, I'd definitely try it out . . . if I had an N9, heh. (Still no idea what the availability situation is going to be like for my country, ah well, at least people already had cool apps out for it; I was late to the party with the N900 too and in that case I had to actually wait for a carrier to enter the market that used the right 3G frequencies!).
Is it portrait-only, or can it rotate into landscape?